Osmotic coefficients of the ternary system water + potassium chloride + sucrose at 0 °C

Abstract

The freezing points of aqueous solutions of potassium chloride have been measured in the concentration range 0.2–2.8 mol kg^–1. Osmotic coefficients have been calculated and compared with the results of previous workers. The freezing points of the ternary system water + potassium chloride + sucrose have been measured for 1 : 1 mole ratio sucrose: KCl from 0.15–1.5 mol kg^–1 KCl, and for a 1 : 3 mole ratio sucrose: KCl from 0.2–2.0 mol kg^–1 KCl. Osmotic coefficients were calculated at 0 °C and fitted to an analytic formula. The experimental results are discussed in terms of the McMillan–Mayer theory of solutions.